28865904271 has 4 divisors (see below), whose sum is σ = 28866902632. Its totient is φ = 28864905912.

The previous prime is 28865904269. The next prime is 28865904313. The reversal of 28865904271 is 17240956882.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28865904271 - 2¹ = 28865904269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28865904241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 454476 + ... + 514081.

It is an arithmetic number, because the mean of its divisors is an integer number (7216725658).

Almost surely, 2^28865904271 is an apocalyptic number.

28865904271 is a deficient number, since it is larger than the sum of its proper divisors (998361).

28865904271 is an equidigital number, since it uses as much as digits as its factorization.

28865904271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 998360.

The product of its (nonzero) digits is 1935360, while the sum is 52.

The spelling of 28865904271 in words is "twenty-eight billion, eight hundred sixty-five million, nine hundred four thousand, two hundred seventy-one".